Lightly coat a medium nonstick frying with I Can't Believe It's Not Butter! spray. Place it over medium heat. Add the apples, cinnamon, vanilla extract, and 5 spritzes of I Can't Believe It's Not Butter! spray. Cook, stirring occasionally for about 20 minutes, or until the apples are soft.

Meanwhile, in a medium saucepan, bring the water and salt to a full boil. Add the oats. Reduce the heat to medium and cook, stirring occasionally, for 6 minutes, or until the water is almost absorbed. Remove from the heat and cover.

When the apples are cooked, stir the apple mixture into the oatmeal. Stir in 2 packets of sugar substitute and the nuts, if desired. Taste and add 1 more packet of sugar substitute, if desired. Spoon into 3 serving bowls. Serve immediately.